Question

我正在尝试使用JAVA Excel API vogella修改现有的Excel文件，但无法处理它。我找到了一种重新创建excel文件的方法，但这不是我想要的。有人可以给出建议，提示或分享一个简短的例子。

我正在分享我正在尝试做的事情：

    /**
     * Reading external file.
     *
     * @return Record[];
     * @throws IOException;
     * @throws BiffException.
     */
    public Record[] read() throws IOException {
        File inputWorkbook = new File(inputFile);
        Workbook w;
        Record[] records = null;
        int rowsCount = 0;
        try {
            w = Workbook.getWorkbook(inputWorkbook);
            Sheet sheet = w.getSheet(0);

            int columnsCount = sheet.getColumns();
            rowsCount = sheet.getRows();
            records = new Record[rowsCount];

            for (int rowIndex = 0; rowIndex < rowsCount; rowIndex++) {
                Record record = new Record(columnsCount);
                for (int columnIndex = 0; columnIndex < columnsCount; columnIndex++) {
                    Cell cell = sheet.getCell(columnIndex, rowIndex);
                    String value = cell.getContents();
                    record.setRecordData(columnIndex, value);
                }
                records[rowIndex] = record;
            }
        } catch (BiffException e) {
            errorMessage = 1;
        }

        return records;
    }

   /**
    * Writing to existing excel file.
    *
    * @param records;
    * @throws IOException;
    * @throws WriteException;
    * @throws BiffException.
    */
    public void write(Record[] records) throws IOException, WriteException, BiffException {
        File file = new File(inputFile);
        WorkbookSettings wbSettings = new WorkbookSettings();

        wbSettings.setLocale(new Locale("en", "EN"));

        Workbook workbook = Workbook.getWorkbook(file, wbSettings);
        WritableWorkbook writableworkbook = Workbook.createWorkbook(file, workbook, wbSettings);
        WritableSheet excelSheet = writableworkbook.getSheet(0);

        createLabel(excelSheet);
        createContent(excelSheet, records);

        writableworkbook.write();
        writableworkbook.close();
    }

Answer 1

您提供的代码是专门写的，以覆盖已存在的代码。此行：

 for (int rowIndex = 0; rowIndex < rowsCount; rowIndex++)

总是从第0行开始，因此会覆盖那里的所有内容。

此外，您之前正在致电：

rowsCount = sheet.getRows();

这将告诉您已填充了多少行。如果您在最后一个填充的行之后开始填充，那么您将保留已存在的所有内容。

使用基于java的API读取/写入Excel - vogella

1 个答案: